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GB/T 21558-2025: Rigid polyurethane foam for building thermal insulation
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Std ID	Version	USD	Buy	Deliver [PDF] in	Title (Description)
GB/T 21558-2025	English	219	Add to Cart	3 days [Need to translate]	Rigid polyurethane foam for building thermal insulation
GB/T 21558-2008	English	189	Add to Cart	3 days [Need to translate]	Rigid polyurethane cellular plastics used in the thermal insulation of building

GB/T 21558-2025: Rigid polyurethane foam for building thermal insulation

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
ICS 83.100 CCSG32 National Standards of the People's Republic of China Replaces GB/T 21558-2008 Rigid polyurethane foam for building insulation Published on 2025-12-31 Implemented on July 1, 2026 State Administration for Market Regulation The State Administration for Standardization issued a statement.

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1.Structure and Drafting Rules of Standardization Documents". Drafting. This document supersedes GB/T 21558-2008 "Rigid Polyurethane Foam for Building Insulation" and is consistent with GB/T 21558-2008. Compared to previous versions, aside from structural adjustments and editorial changes, the main technical changes are as follows. ---The term and definition of "rigid polyurethane foam" have been added (see 3.1); ---The classification and grading have been changed, adding grading by compression performance, grading by combustion performance, and grading by thermal insulation performance (see section 4). Chapter 3 (2008 edition); ---The requirements for compression performance and dimensional stability have been changed (see 5.2.1, 4.4 in the.2008 version); ---Added dimensional stability requirements for rigid polyisocyanurate foam (see 5.2.2); ---The combustion performance requirements have been changed (see 5.3, 4.5 in the.2008 version); ---Insulation performance requirements have been added (see 5.4); ---Added numerical rounding requirements (see 6.4); ---Identification requirements have been changed (see Chapter 8, 7.1 of the.2008 edition). Please note that some content in this document may involve patents. The issuing organization of this document assumes no responsibility for identifying patents. This document was proposed by the China National Light Industry Council. This document is under the jurisdiction of the National Technical Committee on Standardization of Plastic Products (SAC/TC48). This document was drafted by. Wanhua Chemical Group Co., Ltd., Beijing Technology and Business University, Shandong Yinuowei New Materials Co., Ltd., and China Polymer... Association of Polyurethane Industry, Sichuan Fire Research Institute of the Ministry of Emergency Management, China Academy of Building Research Co., Ltd., Shanghai Jianke Inspection Co., Ltd. Huamao Weiye Green Technology Co., Ltd., Langfang Huayu Innovation Technology Co., Ltd., Liaoning Provincial Academy of Construction Sciences Co., Ltd. Anhui Ruilian Energy Saving Technology Co., Ltd., Beijing Building Materials Testing and Research Institute Co., Ltd., and Lvfeng Energy Saving Technology Co., Ltd. Company, Jiangsu Yuexian Refrigeration Equipment Group Co., Ltd., China Academy of Building Research Testing Center Co., Ltd., Jiangsu Jingxue Energy Saving Technology Co., Ltd., Shanghai Huntsman Polyurethanes Co., Ltd., Hebei Yadong Chemical Group Co., Ltd., DuPont (China) R&D Management Co., Ltd., Tianjin Huali Insulation Building Materials Co., Ltd. Materials Co., Ltd., Shandong Lianchuang Polymer Co., Ltd., Wanhua New Materials (Yantai) Co., Ltd., Wanhua Energy Saving (Yantai) Engineering Co., Ltd. Yingjia New Materials (Beijing) Co., Ltd., Xinjiang Cucheng New Materials Co., Ltd., Langfang Green Building Development Center, Xinjiang Honghui Construction Materials Testing Co., Ltd., Light Industry Plastics Processing and Application Research Institute. The main drafters of this document are. Jin Yanli, Song Kuo, Xu Bo, Fu Zhenwu, Li Jianbo, Zhu Jian, Zhu Chunling, Xu Ying, Lu Yili, and Luo Zhenxing. Xu Xiangfei, Fan Wei, Shao Lushan, Liu Cunfang, Zhu Xin, Wang Liansheng, Jia Xi, Zheng Peijie, Yuan Haishun, Zhu Jiancheng, Xing Na, Hong Shuquan, Wang Xu, Zhong Yun Zhang Guibao, Ma Yan, Jin Xinfa, Wang Bin, Ma Lina, Chen Qian. The release history of this document and the document it replaces is as follows. ---First published in.2008 as GB/T 21558-2008; ---This is the first revision. Rigid polyurethane foam for building insulation

1 Scope

This document defines the terminology and definitions for rigid polyurethane foam for building insulation, and specifies its classification, requirements, inspection rules, and labeling. Transportation and storage are described, along with the corresponding test methods. This document applies to the production, sale, and inspection of rigid polyurethane foam for building insulation. This document does not apply to sprayed rigid polyurethane foam for building insulation and rigid polyurethane foam for piping.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included. For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies. This document. GB/T 2035 Plastics Terminology GB/T 2918 Standard Environment for Conditioning and Testing of Plastic Specimens GB/T 6342 Determination of linear dimensions of foamed plastics and rubber GB/T 6343 Determination of apparent density of foamed plastics and rubber GB/T 8170 Rules for rounding off numerical values and the representation and determination of limiting values GB 8624 Classification of fire performance of building materials and products GB/T 8810 Determination of water absorption rate of rigid foamed plastics GB/T 8811 Test method for dimensional stability of rigid foamed plastics GB/T 8813 Determination of compressive properties of rigid foamed plastics GB/T 10294 Determination of steady-state thermal resistance and related properties of thermal insulation materials – Protective hot plate method GB/T 10295 Determination of steady-state thermal resistance and related properties of thermal insulation materials – heat flow meter method GB/T 15048 Rigid Foamed Plastics - Compression Creep Test Method GB/T 19687 Determination of Long-Term Thermal Resistance Changes in Closed-Cell Plastics - Accelerated Laboratory Test Method GB/T 20672 Determination of compression creep of rigid foamed plastics under specified load and temperature conditions GB/T 21332 Determination of water vapor permeability of rigid foamed plastics GB 46520 Technical Specification for Fire Performance of Thermal Insulation Materials and Products for Buildings GB 50016 Code for Fire Protection Design of Buildings (2018 Edition) GB 50072 Cold Storage Design Standard GB 55037 General Code for Fire Protection of Buildings

3 Terms and Definitions

The terms and definitions defined in GB/T 2035 and the following terms and definitions apply to this document. 3.1 Rigid foam based on polyurethane or polyurethane/isocyanurate six-membered ring groups. ...